56354900661 has 8 divisors (see below), whose sum is σ = 83488741760. Its totient is φ = 37569933756.

The previous prime is 56354900653. The next prime is 56354900671. The reversal of 56354900661 is 16600945365.

56354900661 is a `hidden beast` number, since 5 + 635 + 4 + 9 + 0 + 0 + 6 + 6 + 1 = 666.

56354900661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 56354900661 - 2³ = 56354900653 is a prime.

It is a super-2 number, since 2×56354900661² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56354900671) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1043609245 + ... + 1043609298.

It is an arithmetic number, because the mean of its divisors is an integer number (10436092720).

Almost surely, 2^56354900661 is an apocalyptic number.

It is an amenable number.

56354900661 is a deficient number, since it is larger than the sum of its proper divisors (27133841099).

56354900661 is a wasteful number, since it uses less digits than its factorization.

56354900661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2087218552 (or 2087218546 counting only the distinct ones).

The product of its (nonzero) digits is 583200, while the sum is 45.

The spelling of 56354900661 in words is "fifty-six billion, three hundred fifty-four million, nine hundred thousand, six hundred sixty-one".